cunningham



A. CUNNINGHAM.

HOLLOW BASE lELECTRIC WINCH. APPLICATION FILEDSEPT. 23. ISIS.

Patent/ed Get. 19,1920.

2 SHEETSMSHEET I.

fllan (anni:gglzaam.A

A. CUNNINGHAM.

HOLLOW BASE ELECTRICAWINCH. APPLICATION FILED SEPT. 23, '1919.

1,356,131. Patented Oct. 19,1920.

2 SHEETS-SHEET 2.

l UNITED STATES PATENT oFFlcE.

ALLAN CUNNINGHAM, 0F SEATTLE, WASHINGTON.

HOLLOW-BASE ELECTRIC WINCH.

Specification of Letters Patent.

'Patente-d 00h19, 1920.

Application led September 23, 1919. Serial No.32`5,80v0.

and useful Improvementsy in Hollow-Base,

Electric VincheS, of which the following is a specification. f L

My invention/- relates to hoisting devices which are intendedparticularly for marine use and consists of a specialy type ofconstruction of the base upon which the apparatus is mounted.A y`Wherebythe electrical apparatus such, for instance, as the electric controller`and the electric resistors, are mounted lwithin compartments formed inthe base, which compartments are capable of being closed so Vas tobefwatertight.

The special object ofvmy invention is to provide watertight compartmentslocated in the base of the machinefor containing the electricalapparatus whereby such electrical apparatus will be protected fromcontact with the salt water, and will thus be protected against injury,even when the apparatus as a whole is mounted upon deck where it issubjected to the waves which may come aboard the ship.

In the accompanying drawings I have shown the manner in which I havechosen to construct the base of .the hoisting apparatus, in order toproperly protect the electrical apparatus from the salt water.

In these drawings Figure 1 is a side elevation of an electric winch withthe hollow base shown in section, the line of section being takenforward of the apparatus contained therein.

Fig. 2 is the same view showing a slightly different arrangement ofparts. c

Fig. 3`is a section taken through the end wall of one of thecompartments showing the manner of closing the same, and also theremovable stopper, by means of which ventilation may be given thecompartments when the apparatus is in use.

The apparatus which I have shown as an embodiment of my invention, is anelectrically operated cargo winch. The principles of constructionthereinillustrated may be applied to other types of hoisting apparatus,

as, for instance, to an anchor hoisting winch.

The particular work which the hoisting apparatus is to do, forms noessential part of my invention. The invention is confined to themounting of the winch and its motor upon a base and to the constructionof the base, so as to form watertight compartments for the reception ofelectrical apparatus, by

' which the winch'is controlled and operated.

In the drawings, 'l represents the hoisting drum and 10, thecasing ofthe motor by which the drum is operated. So far as my present inventiongoes, the driving means byy which the motor is connected with the drum,may be anything found suitable. I do not therefore thinkit necessary t0describe such a mechanism in det-ail.

The hoisting mechanism above briefly re ferred to, is mounted upon abase 2, which base contains such compartments as may be needed toproperly contain the electrical operating and controlling parts. In Fig.1, I have shown the base as containing three principal compartments, thesame consisting of two compartments 20, which are shown as containingresistors, as 2l, and a third compartment 22, in which is placedanelectric lcontroller 23. y

The resistors 21 may be any suitable type of resistance members which itmay be desired to employ in connection with the motor, in order to varythe intensity of its operation, and also may represent any other type ofelectrical mechanismy which it may be desired to use in connection withan electric motor. The controller 23 represents any suitable type ofcontroller. It is therefore notdeemed necessary to describe in anydetail the construction of either the resistors or controller.

For convenience in placing and removing the electrical apparatuscontained therein, and for otherwise making the same accessible, one, orboth, ends of the chambers 20 and 22, are left open so far as theprincipal base casting is concerned. These openings are, however, closedby a plate, or plates, as 3, which are shown in section in Fig. 3. Theseare secured by bolts so that they may be removed when desired.

The closing plates 3 are provided with openings,ras 30, which when open,furnish means for the ingress and egress of air for cooling purposes.Then the apparatus is not in use, or when such cooling action is notdesired, these openings should be tightly closed, as by the use oi'stopper plates 4. I have shown these stopper plates as being providedwith a groove in their tace adapted to receive a ring 40 of packingmaterial, and a means for securing these plates in psition, consistingof a clamping bolt 5 which screws into a hub 31, carried by the plate 3,which bolt has a hand wheel 50, or other means, secured to the outer endthereof, by which it may be caused to bind the stopper plate 4: securelyin place. IVhen these stopper plates are clamped down, the compartmentwhich contains the electrical apparatus is watertight, and the apparatuscontained therein will not be injured, even it' the water should washentirely over the winch.

In order to use electricity as the motive agent for winch and hoistingdevices which are to be mounted upon the decks oi' ships, it isnecessary to protect the electrical apparatus from the water. Bymounting these in the base, they may be securely protected, and at thesame time are placed so that they do not require the use oit additionalspace.

In Fig. 2 the arrangement is slightly different from that shown inFig. 1. Fig. 2 shows the controller casing 6, as independent ot' thewinch base, and connected therewith by a short tube or collar 60,through which the electric wires pass between the controller and theresistors. Other than this, the construction shown in Fig. 2 is intendedto be the same as shown in Fig. 1.

1. A hoist having a hollow base with compartments adapted to receiveelectrical apparatus for controlling the hoist, the base having anopening for each compartment through which its apparatus may be passed,a plate for each of said openings adapted to watertightly close itsopening, said plates having ventilating openings and stopper platesadapted to watertightly close said ventilating openings.

2. A marine hoist having a base provided with compartment-s for thereception ot' electrical controlling apparatus and having ventilatingopenings at opposite sides thereof and removable stopper plates adaptedto close said ventilating openings to make said compartments watertight.

3. A hoist having a hollow base provided with compartments adapted toreceive the electrical apparatus for operating the hoist, saidcompartments having each a hole adapted to permit passage ot saidapparatus, a plate for watertightly closing each of said holes, thewalls of said compartments having ventilating holes and stopper platesfor watertightly closing said ventilating holes.

Signed at Seattle, Washington, U. S. A., this 17th day of September,1919.

ALLAN CUNNINGHAM.

